Lock.



H. G. VOIGHT.

LocK.

APPLICATION FILED MAR. 23, 1917- v Patented Apr. 16, 1918.

UNITED @TATE PATENT CFFIQE.

HENRY G. VOIGHT, 0F NEW BRITAIN, CONNECTICUT, ASSIGNOR TO SARGENT & COM- PANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented Apr. 16, 1918.

Application led March 23, 1917. Serial No. 158,971.

To all whom t may concern:

Be it known that I, HENRY G. VoiGHT, a citizen of the United States, residing in New Britain, county of Hartford, State of Connecticut, have invented certain new and vuseful Improvements in Locks, of which the following-is a full, clear, and exact description.

This invention relates to locks, and it has special reference to mortise locks in which a latch bolt is retractable by a cylinder-lock mechanism, and also by suitable manually operable means such as a thumbpiece, knob, or the like. The invention also pertains especially to locks of this class in which the bolt is guarded z'. c. deadlocked automatically, on the closing of the door and wherein lboth the latch bolt and the controller bolt for the guarding mechanism can be dogged in the fully retracted position by the key mechanism.

The primary object of the invention is to furnish very simple reliable means for retracting the controller bolt when the latch bolt is retracted, so that when the latter bolt is dogged in the retracted position, the controller bolt will also be held back in the case.

Another obj ect is to furnish a lock in which the controller bolt is retracted by direct engagernent with the latch bolt, and wherein the number of parts is reduced to a minimum. A

To these. and other ends, the invention consists-.in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing,

Figure 1 is an elevation of a mortise lock, embodying my improvements, with the cap plate removed, the bolts being in the normal protracted position.

Fig. 2 is a similar view of the upper part of the lock, showing the bolts dogged in the retracted position, and,

Fig. 3 is a detail sectionv on line 3-3 of Fig. 1.

In the form shown the case 5 of the lock is of the usual mortise type, and contains the customary spring-pressed latch bolt 6. The

shank or stem 7, of the latch bolt, is surrounded by a spring 8, and the rear end of the latch bolt stem is provided with a cross head, 9, by means of which the bolt may be retracted. Beneath the bolt a lever 10, pivoted at 1l, is adapted to engage the crosshead to retract the bolt when lever 10 is actuated by a lifter 12, which may be operated by a pivoted thumbpiece or the like (not shown). The cross-head 9 is also adapted to be engaged for the retraction of the bolt, by the lower extremity 13 of 'a lever 14 pivoted in the upper part of the case at 15. This lever 14 is adapted to be actuated by a cylinder lock 16, having a rotary cam or rollback 17; said cylinder lock being usually located at the outer side of the lock.

Pivoted on a post 18, in the lock case, is a combined retracting and clogging lever 19 having an upwardly extending arm 20, the upper extremity 21 of which lies adjacent to the rollback 17, so as to be engaged thereby when the rollback is turned by the key, as shown in Fig. 2. The arm 20 of lever 19 is. provided with an angular shoulder 22 adapted to cooperate with a pin or projection 23 on lever 14 in such a manner thatas the lever 19 is shifted by the key mechanism from the position shown in Fig. 1, to that shown in Fig. 2, the lever 14 will be shifted on its pivot to retract the latch bolt. As the parts reach the position shown in Fig. 2, the pin 23 snaps from the under side of shoulder 22 to the upper side thereof, and an extension 24 on lever 19 passes down into engagement with the front surface of crosshead 9, the rear extremity of the extension 24 being then somewhat below the pivot 18.

AIn this manner the bolt can be held in the fully retracted position until the key is again inserted to rotate the rollback in the opposite direction, and release the bolt in an obvious manner.

The latch bolt is dogged automatically by the closing of the door, which permits the actuation of a spring-pressed clogging lever. In the form shown, the dogging lever 25 is pivoted at 26 and has a forward extremity 27, adapted to stand behind the upper` part of the latch bolt head under the influence of the spring 28, acting on said lever. The dogging lever is, however, normally held out of the path of the bolt by means of a normally protracted controller bolt 29. ln this instance, the bolt 29 is arranged to slide in an opening of the tace plate located above the latch bolt and it is normally pressed outward by a small coiled spring 30'. Depending from the body or" the controller bolt, is a shank or plate portion 3l, having a projection 32 at its lower end, which when the controller bolt ig protracted so engages an inclined surface on the lower edge of lever 25 that it holdssaid lever Q5 up out of the 'path of the bolt so that the latter can be freely retracted by the key or thumbpiece. `When, however, the door is Closed the controller bolt is forced in, and held in, by a solid portion of the strike plate, and its projection 32 is moved to such a position, relatively, to the clogging lever, that the latter can be shifted by its spring 28 into position back of the head of the bolt whereby the bolt is prevented from being forced in by an instrument or tool, inserted between the door and jamb. This clogging of the latch bolt is, however, an old 'feature in itself. Suita'blemeans are also ,provided for moving the clogging lever out of the path of the bolt when it is desired to release the door from the locked position by use 0f the key mechanism, or the thumbpiece, but this is also awell known feature which l have not considered it necessary to describe it in further detail.

In order that the controller bolt may be retracted simultaneously with the latch bolt, and dogged in the retracted position with the latch bolt, l provide v a portion on the depending lshank or plate 3l of the controller bolt, which lies back of the head of the latchbolt, so that when the latch bolt is retracted the controller bolt will be carried back therewith by a pushing movement exerted by the latch bolt on the shank 31. In the form shown, the shank 31 has a bolt-engaging portion 38 located just in front of the projection 32 and normally lying in the path of the latch-bolt head, but slightly to the rear of the bolt head, as shown in Fig. l. Preferably, the forward edge of the engaging portion V33 is slightly beveled, or inclined, with respect to a vertical plane, and the coperating surface of the latch-bolt head is shaped to correspond, so that the latch bolt will exert a slight lifting effect on the controller bolt and thereby hold its rear portiony E292L in contact with a guide lug 29h on the case located adjacent to the upper edgeV of the part 29a. 1n this manner the controller bolt will be directly retracted by the latch bolt in a very effective manner, and by the use of a minimum number of parts, and it follows that when the latch bolt is dogged in the retracted position, as herein described, the controller bolt will also be dogged in retracted position.

lt will be observed that in the particular torni shown, a projecting portion formed on a depending shank on the controller bolt serves the double function of supporting the clogging lever, and engaging the latch-bolt head for retraction of the controllerbolt. I do not limit myself, however, to a construc- Y tion in which a part on the controller bolt lever for retracting said latch bolt and hold-- ing it in retracted position, said controller bolt having a part extending behind the latch-bolt head so that the controller bolt is retracted and held in a retracted position by the latch bolt. i

2. ln a lock, the combination of a latch bolt, a lever normally tendingr to dog the same, a projecting controller bolt spaced from the latch bolt normally holdingy said lever out of clogging position but adapted to be pressed in by the strike to release ysaid lever as the door is closed, means for retracting said latch bolt, and means for dogging said latch bolt in the retracted position, said controller bolt being directlyY engaged by the latch bolt and retracted1 thereby as the latch bolt is retracted. Y

3. In a lock, a latch bolt, a lever normally tending to dog the saine, a projecting controller bolt arranged above and spaced from the latch bolt and normally holding said lever out of clogging position but adapted to release the same on the closing otfthe door, means for reti-acting said latch bolt, means for clogging'said latch bolt in the retracted position, and a depending member on the controller bolt lying in the path of the latchboltI head, whereby the controller bolt is retracted by the latch bolt. Y

4. ln a lock, a latch bolt, a dogging lever therefor, a controlling bolt spaced from said latch bolt, a projection on said controller bolt engaging said clogging lever to hold the latter in an inoperative position while the door is open, said projection located back of the latch-bolt head in such relation that the controller bolt is retracted by the latch bolt, means for retracting the latchibolt, and means for clogging the latchbolt in vthe retracted position.

5. In a lock, a latch bolt, a doggng lever therefor, a controller bolt above the latch bolt having a depending shank with a projection thereon which engages the under por- 5 tion of the clogging lever when the door is open, to hold said lever in an inoperative position, the lower end of said shank formed to lie back of and close to the head of the latch bolt so that the latch bolt in being retracted engages the same and thereby re- 10 tracts the controller bolt, and means for retracting the latch bolt.

In Witness whereof, I have hereunto set my hand on the 20th day of March, 1917.

HENRY G. VOIGI-I'I.

Copies of this patent may be obtained for ve cents each, by addressing the commissioner of Eatenta,

Washington, D. G. i 

